对马尾松林下栽植胡枝子的培肥效果进行了试验研究。结果表明：２ａ生直播造林的胡枝子平均高度达７５８ｃｍ，平均基径３４ｍｍ；５ａ生生物量高达４３９３５１ｋｇ／ｈｍ２。土壤分析表明，在０～４０ｃｍ土层中，林下栽植胡枝子的土壤有机质、全氮、全磷、水解氮、速效磷、速效钾等比马尾松纯林分别增加３８２８％、２６７５％、２０４１％、２５３３％、１７８４％和２２６６％；土壤微生物数量比纯林高３０６５％。研究认为，胡枝子是恢复和发展马尾松林下植被较好的灌木树种之一。 The effect of cultivation of Pinus massoniana under Pinus massoniana was studied experimentally. The results showed that the average height of Lespedeza branches of direct-sowing Afforestation 2a was 75.8cm, the average base diameter was 3.4mm, and the biomass of 5a was 4393.51kg / hm2. Soil analysis showed that soil organic matter, total nitrogen, total phosphorus, hydrolyzed nitrogen, available phosphorus and available potassium increased by 3828% and 263% compared with pure stand in Pinus massoniana forest in 0 ~ 40cm soil layer respectively. 75%, 2041%, 2533%, 1784% and 2266%, respectively. The amount of soil microorganisms was 3065% higher than pure forest. Studies suggest that Lespedeza is one of the better shrub species to restore and develop Pinus massoniana understory vegetation.